Code

EU Code

Category

Subcategory

Prohibited Supply To

Authority

Document

Notes

• UF 6 mass spectrometers/Ion sources Especially designed or prepared mass spectrometers capable of taking on-line samples from UF 6 gas streams and having all of the following: 1. Capable of measuring ions of 320 atomic mass units or greater and having a resolution of better than 1 part in 320; 2. Ion sources constructed of or protected by nickel, nickel-copper alloys with a nickel content of 60 % or more by weight, or nickel-chrome alloys; 3. Electron bombardment ionization sources; 4. Having a collector system suitable for isotopic analysis.
• Vortex tubes Especially designed or prepared vortex tubes and assemblies thereof. The vortex tubes are cylindrical or tapered, made of or protected by materials resistant to corrosion by UF 6 , and with one or more tangential inlets. The tubes may be equipped with nozzletype appendages at either or both ends. EXPLANATORY NOTE The feed gas enters the vortex tube tangentially at one end or through swirl vanes or at numerous tangential positions along the periphery of the tube.
• UF 6 /carrier gas separation systems Especially designed or prepared process systems for separating UF 6 from carrier gas (hydrogen or helium). EXPLANATORY NOTE These systems are designed to reduce the UF 6 content in the carrier gas to 1 ppm or less and may incorporate equipment such as: (a) Cryogenic heat exchangers and cryoseparators capable of temperatures of 153 K (–120 °C) or less, or (b) Cryogenic refrigeration units capable of temperatures of 153 K (–120 °C) or less, or (c) Separation nozzle or vortex tube units for the separation of UF 6 from carrier gas, or (d) UF 6 cold traps capable of freezing out UF 6 .
• Separation element housings Especially designed or prepared separation element housings, made of or protected by materials resistant to corrosion by UF 6 , for containing vortex tubes or separation nozzles.
• Heat exchangers for gas cooling Especially designed or prepared heat exchangers made of or protected by materials resistant to corrosion by UF 6 .
• Compressors and gas blowers Especially designed or prepared compressors or gas blowers made of or protected by materials resistant to corrosion by the UF 6 /carrier gas (hydrogen or helium) mixture. Rotary shaft seals Especially designed or prepared rotary shaft seals, with seal feed and seal exhaust connections, for sealing the shaft connecting the compressor rotor or the gas blower rotor with the driver motor so as to ensure a reliable seal against out-leakage of process gas or in-leakage of air or seal gas into the inner chamber of the compressor or gas blower which is filled with a UF 6 /carrier gas mixture.
• Separation nozzles Especially designed or prepared separation nozzles and assemblies thereof. The separation nozzles consist of slit-shaped, curved channels having a radius of curvature less than 1 mm, resistant to corrosion by UF 6 and having a knife-edge within the nozzle that separates the gas flowing through the nozzle into two fractions.